Gluten Free Strawberry Banana Upside Down Cake

Name: Gluten Free Strawberry Banana Upside Down Cake
Prep time: 15 min
Cook time: 35 min
Total time: 50 min
Cuisine: American
Ingredients: 2/3 C Mashed Bananas (2 medium bananas); 1 1/2 C Gluten Free 1-to-1 Flour Blend (I use Bob's Red Mill); 1/2 tsp Baking Soda; 1 tsp Baking Powder; 1/2 tsp Cinnamon; 1/2 tsp Salt; 1/3 C Oil (olive oil or melted coconut oil); 1/2 C Sugar; 1/2 C Light Brown Sugar; 1 Egg; 1 Egg Yolk; 1 tsp Vanilla; 1 lb Strawberries (sliced); 1/4 C Light Brown Sugar; 2 Tbsp Cornstarch (or Arrowroot Powder)